The film tells the love story of a female killer and a small photographer who meet and kill each other by chance. Xie Miao subverts the image of the past cold, dark bellied master, and becomes an ordinary small photographer who wants to hold a personal film exhibition. He picked up a diamond necklace by chance when he went out to collect wind. Although the necklace is of great value, Han Xiaofeng (Xie Miao) does not have any evil thoughts about the necklace and is determined to find the owner. Han Xiaofeng, who is devoted to goodness, does not know that there is a huge secret hidden in this seemingly ordinary necklace.